Chore(DPxAI): add teh smooth operator

subjects/DPxAI/the-smooth-operator/README.md

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+## The Smooth Operator
+
+> Mindful AI mode
+> Unlike the song, smooth operators in JavaScript help you perform various calculations and manipulations with ease.
+
+### AI-Powered Learning Techniques
+
+**Step-by-Step Instruction Technique:**
+
+This type of prompt encourages the AI to provide detailed, step-by-step instructions for learning new concepts.
+
+> Find the examples across the subject ;)
+
+## Concepts:
+
+### Math Operators
+
+In JavaScript, operators are symbols that perform operations on variables and values. Let's delve into the most common types of operators you'll encounter.
+
+There are other operators other than assignment, for now let's focus on the one you
+probably already know:
+
+- `+` Addition
+- `-` Subtraction
+- `/` Division
+- `*` Multiplication
+
+Those operators are used the same way we would write them in math:
+
+```js
+console.log(5 + 7); // -> 12
+console.log(5 * 5); // -> 25
+console.log(7 - 5); // -> 2
+console.log(9 / 3); // -> 3
+```
+
+Operators are evaluated using classic priority:
+
+```js
+console.log(1 + 5 * 10); // -> 51
+```
+
+you can use parentheses `()` to enforce priority:
+
+```js
+console.log((1 + 5) * 10); // -> 60
+```
+
+And they result in a value, so they can be assigned to variables:
+
+```js
+let halfMyAge = 33 / 2;
+let twiceMyAge = 33 * 2;
+```
+
+#### **`Prompt example`**:
+
+"Can you provide step-by-step examples of basic math operations in JavaScript?"
+
+### Placeholders
+
+JavaScript allows you to include expressions within strings using template literals. This is done using backticks ``(`)`` and the `${}` syntax to include expressions.
+
+#### Example
+
+```js
+console.log(`5 + 10 = ${5 + 10} = 15`); // -> 5 + 10 = 15 = 15
+```
+
+**Note that it only works using:** the `` ` `` backtick, not the `"` or `'`
+quotes.
+
+#### **`Prompt example`**:
+
+"Can you provide a step-by-step guide on how to use template literals to create a string that includes variable values in JavaScript?"
+
+### Instructions
+
+#### Task 1:
+
+Your code must use the given variable `smooth` as our initial value
+
+> When in doubt, always test your code with console.log() and the Run button.  
+> But, when the platform gives you an already existing variable to manipulate, like the `smooth` variable here, if you want to use/display it, you have to do so with the submit button.  
+> You'll then see the result in the code editor console output, as this variable is not available in `Run` button mode, but only in `Submit` button mode.
+
+```js
+console.log("smooth = ", smooth);
+let lessSmooth = smooth - 5;
+console.log("lessSmooth = ", lessSmooth);
+```
+
+You will declare a few variables:
+
+- `lessSmooth` that is just `1` less than `smooth`
+- `semiSmooth` that is half the amount of `smooth` _(it's still pretty
+  smooth)_
+- `plus11` that is `smooth` plus `11`
+- `ultraSmooth` that is the square of smooth _(now that's smooth !)_
+
+#### Task 2:
+
+We will provide a variable `name` and `age`. They will be pre-declared by us.
+
+Declare your robot's `presentation` variable of the string:
+
+> `Hello, my name is` **name** `and I'm` **age** `years old`
+> But use placeholders to build the string you will put inside the `presentation`.  
+> Put the values of the provided variables `age` and `name` inside those placeholders.
+
+---
+
+> BGM:
+> [Sade - Smooth Operator - Official - 1984](https://www.youtube.com/watch?v=4TYv2PhG89A)